Valve



Jan. 19,1954 G. R. ERICSON VALVE Filed April 14, 1948 INVENTOR. 9 .5 I

BY geozge 756m Patented Jan. 19, 1954 UNITED American Cari.

andv Foundrys Company, l N ew- York, ,N. ,Y.'', .,avco'rimration.ol'JIN'w Jersey,

Application Aillil'll, 19485'Serial Mme 20,900

e'ciaimsp ((31.251-496) v fllhisr invention relates --to valves?-andmorapan ticularly; to the cylindrical-e plug type:- ef valve: which maybe. lubricated Elf desireds onetof I the objects-.of;this-invention-isto-ipro ridew anc expansible: plug; ,for-. cylinder valves inwhichitherexpansioniof. the:plug is due' to the provision t: aisle-textending; longitudinallyiof thel-plugpbody.

- A-iurther objectioi "this invention LiSstQ provides valves of the:type in question which; the: cylindricaliplug iszoft shelllform; withthe-:innerr wall-oi thershell'ieccentriato theoutenwall-gand; in which aslottisprovided;10ngitudinally1ci -the plug-sin that area aofithe-greatest reduced thickness. so( as: toiprovi-der-arcuate; taperedvwings :for expansiblyt engaging the walLof-the plug VA- furtherobjectof thistinvention is toepro+- videoa three-part valve inlWhich-sanexpansible. cylindricalz valve isarrangedinacasing provided.- with .f a}cylindrical bore, and. a separable roller-e atingstem -associated.with.the valve and: projectainto; theecasingatooperate-the structure. 7

This invention will; be better understoodin;referencepto-ltheraccompanyingespecification and dr'awingsefiniwhich; v

v fig 1representsa ertical-.crossnsectional view-;-

of; thecvalvm Fig, 2 -is-a .crossesectional-view oi the valve shown.imEigaL;

31 is. a.crossesectionaltviewr ofi=theovalve= memberv'ori plug;

lilig.,. 4.-=iisal plan view" of ithe-l-stemuors turning membersaml Figs45" is talcrossesectionaliviewaof a; modified. valvamember; or plug;toiEig. 3.- 1

'Ihew-valve-icomnrisesi a Lmam=TbQd member; or: casing, I, havinga-.-rotatable-.plug lore waiver-mania ber 2 which isprovidedowithaneccentrie'horeth By locating the bore 3 eccentric withrespect to theevalveeanditheebodyy-bore, the walls of the valve will beof constantly decreasing thickness and "constantly increasing,resilience towardflthe slit to permit close engagement betweenthe'valve andbodyifibbtliomn-andhlsed pos'trons. This valvemember isformed withzaislit mama-tribe qughdcastin einmwliich'scase" aapasirroirams necessarilytafinishedfsmzfaee leetsaa maybe \projectedsinwardlyemailing the eHgthP'iOf theyalvememberras indicatedriinmrcasezthelbore .3. i s .finishedritzmay bec-desira; hie-Etoremove thelugs l Sanitation the opposite sides 0,1? theslit 4 .for. theevwholeilenthl' ofz t ie biz-wand permit them to proie'ctamwardlwasxdicatedziatifili in Figl5. The-:correspondingflug 6| will be treatedaccordingly in either case. The purpose oftheseilugs'isitoipermit.iturning of the valvesby ia wrench or stem?!which lis provided withslots '8 to engageitlieasidsoflthe lugsifiliorBi-aacordihg to whiclr'way-y'thesvalveiise being It will be understoodthat the valve formed Theeboree with the longitudinal slot' d may beorig'inallytground withca shim :63 in .therslot while in I com pressed.-condition,=.. so".- that sit: willspring basic agaimandwexpand slightly;when released, (so-that: the rva-lvemay," be ground a-nd.:finished etc 7exactly thesame. diameter as the interior .7 of the bore- 9113f;the-ecasingmember I ,and yet have aetend--- 611037.? to. expand and-2snugly: lit the bore-=of the casing; Itlwill, of course, tbaunderstoodthait the shim-this. not to: be. left in theslot whenxthe valve? is;assembled the: bedy== but Elias-beam shown in placeonlyforaconvenienceoftclescrip tion. This causes the valve to makeaisnugfit inthe:casingmegardless of pressureof the lading which-mayvbathrough.=the;inlet and-outlet openingsi 20sand'2 l It -is :also.tonbetunderstoodithat: in: sthisr-particular typeofi: valve ittmakes nodif ferenceiwhi-chr opening; isused (for l thesinlet' and which for; theoutlet z/as the-valve willtal-ways besealed-against pressureineither-cases The-stem J is-iseparatevancl distinct--from=- :andshiftabler-with respect ttoithe-ivalve' 2 and. bastard annular seat I 2forming atsealnto. preventtthe escape ofvthesladingraround the stem Ildesiredtpackinglsuch aslov-ringtl 3 rnay be provided-as. in-the grooveil 4 .m. additionalfsealfingesecurity Y While thiswvaLVe.isjdesigned iforhighwpressure use and is desired to turn freely abalancing end' or st emlimonstituting in i efiect' a piston. 7 conneetedto ltheestemzil'may, be.placed 'at the lower endnfithacasingeand: surrounded by a similarcaring-or other; packing. I16. Iii: order to i make the-valvet readily.convertible" from a balanme'dv valveiida fullysealdfstem.afreliil'port-l Tseald" aiscrewtvalve lflfmay beiprovided'inan ei tension l9atlthelowen endiof "the valve; ,thu's' then-valves l8'Q-may b'ewunscr'eweol" if "dsiied tore lievecthe.pressure.=at..-theport [1 for balancing piirposesitoimake th'evalve easygto turn" and thentightened againto cl'ose port' IT and f to form a"001111316265831385001135 the valve .has beenzro- .tatedtootlieaisiredipnsitionz valvesmay if'f dsiredi'. be: lubricated biz:-

means: otL-asscrew 23i mounted; ili";the?stem.'i al thoughitsell'ibricationtislnotf an absoliite -neces=- sityras athe:niechanica1structureof tlie valve it sociated 'grooves. This results in the'fiisttirrning Due to the above described construction there is always aresilient metal-to-metal contact between the seating surfaces of thevalve and the casing and this resilient force is increased by linepressure so as to insure a tight seal. Due to the fact that the plug 2is hollow and also the fact that its walls at the sealing surfaces arenot quite as thick as the walls of the casing at the sealing surfaces,the bending stresses of line pressure on the inside of the valve, forinstance as indicated by the arrows 25, result in greater strain of themember 2 than of the valve casing I at a point surrounding the adjacentseat. This provides ample opportunity for the valve ring to conformto'the surface of the seat regardless of changes in the shape and sizeof the seat which may occur when the valve and line are subjected tohigh pressure.

I claim:

1. In a valve structure, a valve casing having a vertical bore andtransversely extending inlet and outlet openings, a valve plug in saidcasing arranged for rotative movement about its axis, said valve plughaving inlet and outlet ports for registering with the inlet and outletports of said casing, and being formed as a tubular shell structure withthe contour of the inner wall eccentric to the contour of the outerwall, and a valve stem for said plug separate from said valve plugwhereby the latter may move relative to' the stem, said valve stemincluding a radial flange adapted to normally engage the plug structureand also including vertically spaced ends of substantially equal areapositioned above and below said tubular shell.

2. In a valve structure, a valve casing having a vertical bore andtransversely extending inlet and outlet openings, 7 I arranged formovement about its axis in said bore, said valve plug being ingeccentric to the outer wall, a valve stem mounted in said. casing andbeing separate from and shiftable relative to the split shell, saidvalve stem being provided with upper and lower spaced apart bearingportions of substantially equal area, O-rings sealing the upper andlower portions of said stem, and lost motion means connectingsaid. stemand said shell whereby rota-- tion of the stem will move said shellaboutits axis to cause relative movement between the ports in the shelland the ports in the casing.

3. In a valve structure, a valve casing formed with a cylindrical bore,inlet and outlet openings formed in the cylindrical. wall of the casing,a valve plug adapted to ,be arranged in said cylindrical bore, saidplugbeing formed, of a split cylindrical shellnwithjhecontour of theinner face of the shell eccentric to the contour of the outer face ofthe shell, a valve stem separate from the shell, lost motion means foroperably connecting said valve-stem and said shell, a piston at one endof the valve stem and joined to the stem by means extending axiallythrough said shell, said piston having an area substantially equal tothestem area and operatingin a ported chamber connected to theatmosphere, and a a valve plug adapted to be formed as a verticallysplit cylindrical shell, the inner wall of ,said shell bed valve foropening and closing the port of said chamber. i

4. The substance of claim 3 characterized in that means are provided forforcing lubricant into the valve stem for providing lubricant underpressure to the operating parts.

5. In a valve structure, a casing formed with a cylindrical bore andradiating inlet and outlet openings, a valve plug for the casing, saidvalve plug comprising a vertically split cylindrical shell rotatable insaid bore, the inner wall of said shell being eccentric to the outerwall and to the axis of the shell, said shell being so constructed andarranged that its thickened portion is diametrically arranged withrespect to the split in said shell, whereby arcuate wings are providedfor the shell of tapering thickness and sufficiently resilient to insureengagement with the wall of the bore of the casing, ports formed in saidshell and extending through the thickened and split portions thereof,and means engaging the shell adjacent the edges of the split anddiametrically opposite thereto for rotating said shell in said casing,an operating stem extending axially through the valve structure andoperably associated with the shell, said stem being provided with O-ringpackings above and below the shell.

6. In a valve structure, a valve casing formed with a cylindricalbore,radiating inlet and outlet openings formed in the cylindrical wall ofthe casing, an opening formed in one end of I the casing, a valve plug,said valve plug comprising a split cylindrical wall, with the axis theshell for registering 1 ject through the opening in the end of thecasing, and means for operably connecting said stem and said shell atspaced points of the shell structure immediately adjacent the edges ofsaidsplit and diametricallyopposite thereto, said stem including aportion extending axially through the cylindrical shell and engagingsealing means of O-ring form provided above and below the shell and theports formed therein.

GEORGE R. ERICSON.

References Cited in the file ofthis patent UNITED STATES PATENTS 507,725Great Britain of 1939 shell, the inner wall' of said shell being formedeccentric to its outer of the inner wall so arranged that the'shell isof greater thickness at a point thesplit in the shell,

inlet and outlet openings in

